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"Erase or triple": list of the successive integers that produce the next "altitude" record (see the comments section).
3

%I #16 Mar 20 2018 12:03:26

%S 1,10,23,176,1760,2183,2640,23976,24056,26784,29087,29701,30715,31456,

%T 32145,46250,47521,51280,52910,53280,58460,73268,92130,92768,283067,

%U 290867,301452,307261,315460,317460,321460,324056,324187,341298,1029857,1035298,1056943,1805976,1980726,2197806,2309571,2381954

%N "Erase or triple": list of the successive integers that produce the next "altitude" record (see the comments section).

%C If the "Erase or triple" protocol is applied to a(1) = 1 (see A300148), the biggest integer reached is 17010; when the same protocol is applied to a(2) = 10, we reach the "altitude" 65610; when applied to a(3) = 23, the "altitude" reached is 121743; when applied to a(4) = 176, the "altitude" reached is 1154736; etc.

%C The sequence is finite and has 628 terms, with a(628) = 3291768054 (pandigital); a(628) reaches the maximum possible "altitude" 29625912486.

%H Jean-Marc Falcoz, <a href="/A300150/b300150.txt">Table of n, a(n) for n = 1..628</a>

%Y Cf. A300148, A300149.

%K nonn,base,fini

%O 1,2

%A _Eric Angelini_ and _Jean-Marc Falcoz_, Mar 16 2018